Improvement in compressed-air heating apparatus



i; H. BUSHNELL.

Compressed Air Heating Apparatus.

' N0.140,466. Patentedjulyhi873e AM PHO TD-YUTHO eRAPn/c ca M x (useoR/vs's PRO 0555) UNITED STATES PATENT OFFICE.

HENRY BUSHNELL, OF NEW HAVEN, CONNECTICUT.

IMPROVEMENT IN COMPRESSED-AIR HEATING APPARATUS.

Specification forming part of Letters Patent No. 140,466, dated July 1, 1873 application filed March 12, 1873.

To all whom it may concern:

Be it known that I, HENRY BUSHNELL, of New Haven, in the county of New Haven and State of Connecticut, have invented a new Improvement in Compressed-Air Heating Apparatus; and I do hereby declare the following, when taken in connection with the accompanying drawing and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawing constitutes part of this specification, and represents a sectional side view.

This invention relates to the construction of a device to utilize compressed air for heating purposes.

It is well known that by compressing air it becomes heated in proportion to the compression. To take advantage of this fact is the object of my invent-ion and it consists in combining, with a suitable reservoir and pump for forcing air, one or more registers or openings having a pressure-valve arranged between the said reservoir and the register, so that when a certain pressure of air shall have been attained the valve will open and allow the escape of this compressed air.

A is an air-pump; B, the piston-rod, the mechanism for operating which may be any known power. Any known pump, which will force air, will answer the purpose of this invention. From the pump air is led, by a suitable tube, to a reservoir, 0, into which the air is compressed. From this reservoir a pipe or pipes, D, lead to the several points where heat is required, E representing a register in the floor F, to which the pipe leads. At some convenient point between the reservoir and the register a pressure-valve, G, is arranged, the pressure upon which should be made adjustable; and whenever the pressure in the register exceeds the defined pressure upon the valve the valve will open and air will pass through the valve to the register into the room or apartment to be heated. A constant supply of air to the register maintains the pressure and constant flow through the register. The amount of heat depends entirely upon the compression of the air, the greater the compression the greater the amount of heat, and vice versa, according to well-known laws. The reservoir may be a combination of tubes, or may be a cylinder, or a combination of tubes, (1, within a reservoir, 0, may be arranged, the compressed air passing through the tubes, thence through the pipes D to the registers. In such case the reservoir 0 may he filled with water, which will be heated by the compressed air passing through the tubes, so as'to generate steam, and this steam may be led by a pipe or pipes, H, to a radiator, L, thus utilizing the compressed air, first, to generate steam as a heating medium, and, second, as a heating medium itself, or it may be used alone for either one or the other.

This use of compressed air is designed for localities where fuel is difficult to obtain, and in such places the power for forcing the air would be wind, or animal power. The adapting of such power for mechanical purposes is too well known to require-explanation in the specification.

I'claim as my invention- 1. In" combination with a suitable reservoir within which to compress the air, the conductors or pipes D, more or less in number, leading to their respective registers E, with a pressure-valve, G, arranged between the said {riegisters and reservoir, substantially as speci- 2. In combination with a steam-generator having a series of tubes through which compressed air is forced as a means for generating steam, the radiators L, more or less in number, having pipes leading thereto from the said generator for heating purposes, substantially as set forth.

HENRY BUSHNELL.

Witnesses:

J. H. SHUMWAY, A. J. TIBBITs. 

